package com.example.wc.logindemo.postupload;

import android.annotation.SuppressLint;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

import java.io.File;

/**
 * Created by hui on 2017/3/23.
 */

public class SystemPicturePath {

    // 解析获取图片库图片Uri物理路径
    @SuppressLint("NewApi")
    public static String parsePicturePath(Context context, Uri uri) {

        if (null == context || uri == null)
            return null;

        boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        // DocumentUri
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageDocumentsUri
            if (isExternalStorageDocument(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                String[] splits = docId.split(":");
                String type = splits[0];
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + File.separator + splits[1];
                }
            }
            // DownloadsDocumentsUri
            else if (isDownloadsDocument(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));
                return getDataColumn(context, contentUri, null, null);
            }
            // MediaDocumentsUri
            else if (isMediaDocument(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                String[] split = docId.split(":");
                String type = split[0];
                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }
                String selection = "_id=?";
                String[] selectionArgs = new String[] {split[1]};
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }
        return null;

    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param context       The context.
     * @param uri           The Uri to query.
     * @param selection     (Optional) Filter used in the query.
     * @param selectionArgs (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     */
    private static String getDataColumn(Context context, Uri uri,
                                        String selection, String[] selectionArgs) {

    Cursor cursor = null;
    final String column = "_data";
    final String[] projection = {column};

    try {
    cursor = context.getContentResolver().query(uri, projection,selection, selectionArgs, null);
    if (cursor != null && cursor.moveToFirst()) {
    final int column_index = cursor.getColumnIndexOrThrow(column);
    return cursor.getString(column_index);
    }
    } finally {
    if (cursor != null)
    cursor.close();
    }
    return null;
        }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    private static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    private static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    private static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }
}
